Tension-reguiating mechanisms for warp beams



mam-w Aug. 28, 1923.

J. NORTHROP TENSION REGULATING MECHANISM FOR WARP BEAMS 2 sheets sheefi 1 Filed Aug. 16 1,921

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Aug. 238, i923.

J. NORTHHQP I TENSION REGULATING MECHANISM FOR WARP BEAMS 2 Sheets-Sheet 2 Filed Aug.

this time the Weight arm will be in its lowered position with the Weight resting on the floor 42. After the end of the chain is hooked into the recess in the flan e of the chain drum, the chain drum will be turned by hand until the free slack of the chain is taken up, the chain drum afiording provision for takin up more or less loose end of chain, and thei the operative, holding the chain drum with one hand will raise the Weight arm With his other hand, thereby swinging the Warp shoe upwardly into contact with the surface of the Warp body on the Warp beam, the pawl 22 catching successive teeth on the ratchet wheel of the chain drum as the Weight arm is lifted. When the upward motion of the Weight arm is arrested by the engagement of the Warp shhe with the Warp body, the

operative will then let go of the Weight arm, and the Weight 23 pressing upon the Weight arm 20 will tend .to turn the chain drum in a direction to cause a pull to be exerted upon the tension chain to apply friction to the tension drum. As the Warp is consumed, the Warp shoe Will follow in, pressing against the Warp body, the spring figi pressing it inward as far as it may,

A J Q and thereby the position oi the Weight on the weight arm is determined by the radius of the Warp body, causing the weight to exert a greater tension upon the tension chain when the warp body is large, and gradually reducin the amount of such tension by pulling in the weight toward the stud 16 as the warp body decreases in size.

Having thus described the invention, what is claimed is:

1. Tension regulating mechanism for warp vteams having, on combination, a

aeeioo tension drum adapted to be connected with the Warp beam, a tension member having one end secured to a stationary part of the loom wound around the tension drum, :1 chain drum to which the free end of the chain is attached, a Weight arm, a weight, a pawl and ratchet connection between the chain drum and Weight arm, and means for moving the weight on the weight arm to cause it to exert a less tension upon the tension member as the size of the warp beam decreases.

2. Tension regulating mechanism for War beams having, 11: combination, a tension drum adapted to be connected to a warp beam, a friction member with one end fastened, its body Wound around said tension drum, and the other end secured to a second drum, a weight arm upon which the second drum is mounted, a Weight on the weight arm and aQratchet connection between the "Weight arm and second drum.

3. Tension regulating mechanism for beams having, in combination, a tension drum, a tension member having one end secured to a fixed partof the loom, its body Wound around the tension drum, and the other end connected to a second drum, a weight am on which it is "mounted, a Weight on the arm, a Warp shoe for engaging the surface of the warp on the warp beam, means for pressing the Warp shoe against the surface of the Warp, and con- JONAS NQRTHRQPV 

